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Critical severity9.8NVD Advisory· Published Sep 15, 2026· Updated Oct 5, 2026

CVE-2026-92066

CVE-2026-92066

Description

Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

5

Mozilla Corporation/Firefox2 versions
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*range: <156.0.0
- (no CPE)range: before 156
Mozilla Corporation/Thunderbird2 versions
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*range: <156.0
- (no CPE)range: before 156
osv-coords
pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweed
Range: < 156.0-1.1

Patches

Vulnerability mechanics

References

3

www.mozilla.org/security/advisories/mfsa2026-90/nvdVendor Advisory
www.mozilla.org/security/advisories/mfsa2026-94/nvdVendor Advisory
bugzilla.mozilla.org/show_bug.cginvdPermissions Required

News mentions

1

Mozilla Firefox: 25 Coordinated Vulnerability Disclosures Impacting Multiple Components
Vypr Intelligence · Sep 15, 2026